Heat transfer in a radially rotating square-sectioned duct with two opposite walls roughened by 450 staggered ribs

Shyy Woei Chang, Tong Minn Liou, Wen Hsien Yeh, Jui Hung

研究成果: Conference contribution

1 引文 (Scopus)

摘要

This paper describes an experimental study of heat transfer in a radially rotating square duct with two opposite walls roughened by 45° staggered ribs. Air coolant flows radially outward in the test channel with experiments to be undertaken that match the actual engine conditions. Laboratory-scale heat transfer measurements along centerlines of two rib-roughened surfaces are performed with Reynolds number (Re), rotation number (Ro) and density ratio (Ap/p) in the ranges of 7500-15000, 0-1.8 and 0.076-0.294. The experimental rig permits the heat transfer study with the rotation number considerably higher than those studied in other researches to date. The rotational influences on cooling performance of the rib-roughened channel due to Coriolis forces and rotating buoyancy are studied. A selection of experimental data illustrates the individual and interactive impacts of Re, Ro and buoyancy number on local heat transfer. A number of experimental-based observations reveal that the Coriolis force and rotating buoyancy interact to modify heat transfer even if the rib induced secondary flows persist in the rotating channel. Local heat transfer ratios between rotating and static channels along the centerlines of stable and unstable rib-roughened surfaces with Ro varying from 0.1 to 1.8 are in the ranges of 0.6-1.6 and 1-2.2 respectively. Empirical correlations for periodic flow regions are developed to permit the evaluation of interactive and individual effects of rib-flows, convective inertial force, Coriolis force and rotating buoyancy on heat transfer.

原文English
主出版物標題Proceedings of the ASME Turbo Expo 2006 - Power for Land, Sea, and Air
頁面117-126
頁數10
DOIs
出版狀態Published - 2006 十一月 15
事件2006 ASME 51st Turbo Expo - Barcelona, Spain
持續時間: 2006 五月 62006 五月 11

出版系列

名字Proceedings of the ASME Turbo Expo
3 PART A

Other

Other2006 ASME 51st Turbo Expo
國家Spain
城市Barcelona
期間06-05-0606-05-11

指紋

Ducts
Heat transfer
Buoyancy
Coriolis force
Secondary flow
Coolants
Reynolds number
Engines
Cooling
Air
Experiments

All Science Journal Classification (ASJC) codes

  • Engineering(all)

引用此文

Chang, S. W., Liou, T. M., Yeh, W. H., & Hung, J. (2006). Heat transfer in a radially rotating square-sectioned duct with two opposite walls roughened by 450 staggered ribs. 於 Proceedings of the ASME Turbo Expo 2006 - Power for Land, Sea, and Air (頁 117-126). (Proceedings of the ASME Turbo Expo; 卷 3 PART A). https://doi.org/10.1115/GT2006-90153
Chang, Shyy Woei ; Liou, Tong Minn ; Yeh, Wen Hsien ; Hung, Jui. / Heat transfer in a radially rotating square-sectioned duct with two opposite walls roughened by 450 staggered ribs. Proceedings of the ASME Turbo Expo 2006 - Power for Land, Sea, and Air. 2006. 頁 117-126 (Proceedings of the ASME Turbo Expo).
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Chang, SW, Liou, TM, Yeh, WH & Hung, J 2006, Heat transfer in a radially rotating square-sectioned duct with two opposite walls roughened by 450 staggered ribs. 於 Proceedings of the ASME Turbo Expo 2006 - Power for Land, Sea, and Air. Proceedings of the ASME Turbo Expo, 卷 3 PART A, 頁 117-126, 2006 ASME 51st Turbo Expo, Barcelona, Spain, 06-05-06. https://doi.org/10.1115/GT2006-90153

Heat transfer in a radially rotating square-sectioned duct with two opposite walls roughened by 450 staggered ribs. / Chang, Shyy Woei; Liou, Tong Minn; Yeh, Wen Hsien; Hung, Jui.

Proceedings of the ASME Turbo Expo 2006 - Power for Land, Sea, and Air. 2006. p. 117-126 (Proceedings of the ASME Turbo Expo; 卷 3 PART A).

研究成果: Conference contribution

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N2 - This paper describes an experimental study of heat transfer in a radially rotating square duct with two opposite walls roughened by 45° staggered ribs. Air coolant flows radially outward in the test channel with experiments to be undertaken that match the actual engine conditions. Laboratory-scale heat transfer measurements along centerlines of two rib-roughened surfaces are performed with Reynolds number (Re), rotation number (Ro) and density ratio (Ap/p) in the ranges of 7500-15000, 0-1.8 and 0.076-0.294. The experimental rig permits the heat transfer study with the rotation number considerably higher than those studied in other researches to date. The rotational influences on cooling performance of the rib-roughened channel due to Coriolis forces and rotating buoyancy are studied. A selection of experimental data illustrates the individual and interactive impacts of Re, Ro and buoyancy number on local heat transfer. A number of experimental-based observations reveal that the Coriolis force and rotating buoyancy interact to modify heat transfer even if the rib induced secondary flows persist in the rotating channel. Local heat transfer ratios between rotating and static channels along the centerlines of stable and unstable rib-roughened surfaces with Ro varying from 0.1 to 1.8 are in the ranges of 0.6-1.6 and 1-2.2 respectively. Empirical correlations for periodic flow regions are developed to permit the evaluation of interactive and individual effects of rib-flows, convective inertial force, Coriolis force and rotating buoyancy on heat transfer.

AB - This paper describes an experimental study of heat transfer in a radially rotating square duct with two opposite walls roughened by 45° staggered ribs. Air coolant flows radially outward in the test channel with experiments to be undertaken that match the actual engine conditions. Laboratory-scale heat transfer measurements along centerlines of two rib-roughened surfaces are performed with Reynolds number (Re), rotation number (Ro) and density ratio (Ap/p) in the ranges of 7500-15000, 0-1.8 and 0.076-0.294. The experimental rig permits the heat transfer study with the rotation number considerably higher than those studied in other researches to date. The rotational influences on cooling performance of the rib-roughened channel due to Coriolis forces and rotating buoyancy are studied. A selection of experimental data illustrates the individual and interactive impacts of Re, Ro and buoyancy number on local heat transfer. A number of experimental-based observations reveal that the Coriolis force and rotating buoyancy interact to modify heat transfer even if the rib induced secondary flows persist in the rotating channel. Local heat transfer ratios between rotating and static channels along the centerlines of stable and unstable rib-roughened surfaces with Ro varying from 0.1 to 1.8 are in the ranges of 0.6-1.6 and 1-2.2 respectively. Empirical correlations for periodic flow regions are developed to permit the evaluation of interactive and individual effects of rib-flows, convective inertial force, Coriolis force and rotating buoyancy on heat transfer.

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Chang SW, Liou TM, Yeh WH, Hung J. Heat transfer in a radially rotating square-sectioned duct with two opposite walls roughened by 450 staggered ribs. 於 Proceedings of the ASME Turbo Expo 2006 - Power for Land, Sea, and Air. 2006. p. 117-126. (Proceedings of the ASME Turbo Expo). https://doi.org/10.1115/GT2006-90153